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Date: Thu, 19 Dec 2013 00:03:46 +0000
From: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
To: Ingo Molnar <mingo@kernel.org>,
        linux-kernel <linux-kernel@vger.kernel.org>
Cc: David Herrmann <dh.herrmann@gmail.com>, Takashi Iwai <tiwai@suse.de>,
        Stephen Warren <swarren@wwwdotorg.org>,
        "linux-fbdev@vger.kernel.org" <linux-fbdev@vger.kernel.org>,
        the arch/x86 maintainers <x86@kernel.org>
Subject: Re: cirrusdrmfb broken with simplefb
Message-ID: <20131219000346.0f722b65@alan.etchedpixels.co.uk>
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> > That bug always existed, simplefb is just the first driver to hit it 
> > (vesafb/efifb didn't use resources). I'm aware of the issue but as a 
> > workaround you can simply disable CONFIG_X86_SYSFB. That restores 
> > the old behavior.
> 
> This looks like a regression, so we'll either need a fix or we'll have 
> to mark CONFIG_X86_SYSFB as CONFIG_BROKEN.

Kernel bugzilla has entries for simplefb breaking both vesafb and matrox
mga.